Smoke-stack



(No Model.)

J. RITCHIE.

SMOKE STACK;

Patented May 1,1883.

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UNITED STATES PATENT Danica,

JAMES RITCHIE, OF DETROIT, MICHIGAN.

SMOKE-STACK.

SPECIFICATION forming part of Letters Patent No. 276,716, dated May 1, 1883.

' Application filed January 22, 1883. (No model.)

To all whom it may concern:

Be it known that I, JAMES RITCHIE, of Detroit, iu the county of 'Wayne and State of Michigan, have invented new and useful Improvements in Smoke-Stacks; and I do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanyingdrawing, which forms a part of this specification.

This invention relates to certain new and useful improvements in the construction ofsmokestacks, and is especially. designed for locomolives.

The invention consists in the peculiar construction, combination, and adaptation of the parts with relation to such smoke-stack as will efi'ectually break up the sparks emitted under ordinary circumstances from such stack under the draft-pressure, and reduce such sparks or small pieces of incandescent fuel to such small size that when finally ejected from the smokestack no danger will arise of setting fire to any piece upon which sparks may fall.

Many fires along the lines of railways are directly traceable tothe sparks or small pieces of incandescent fuel thrown out by the smokestacks, such sparks being of sufiicient size to remain incandescent a sufficient length of time to ignite combustible material upon which they may fall; and the object of this invention is to entirely prevent the occurrence of such accidents. V

In the accompanyingdrawing, which forms a part of this specification, my invention is shown in vertical central section, in which- A represents the stack proper, and B the discharge-mouth thereof, upon the top of which is secured the cap 0, the opening D in the top of which is larger in area than that of the stack proper. The cap 0 is adjustably secured to the mouth-B by means of an annular clampring, E, formed of metal, rolled or worked into an angular form, the angles of which adapt the ring-clamp to fitthe angular adjoining sections of B 0 together; and this clamp is provided at the meeting ends thereof with ears or, provided with coincident bolt-holes I), through which a suitable bolt passes to engage the parts together. This method of securing the two parts together makes it very easy to detach the cap or top of the stack whenever desired, and avoids the necessity of hinges or other devices, such as usually employed, and which are cumbersome and take considerable time to adjust. At equal distances apart there are secured the rod-supports F, by means of bolts and nuts 0, to the lower part of the mouth B, just above its junction with the top of the stack proper, and a slightlyconical throat, G, is secured, by suitable bolts, d, to the lower end of the vertical part ofthe supports F, the lower end of such throat being slightly larger than its upper end and slightly above the top of the stack proper. Near the upper end of the supports F is adjustably secured the inverted cone H by means of the nuts e, and the outer periphery of this cone H is corrugated, as shown; and to render the effect of these corrugations more successful the sides of the cone are preferably slightly curved, as shown in the drawing. A ring, I, curved in cross-section, with its lower face corrugated, as shown, is sleeved upon the supports F, and adjustably supported in its position by means of boltsf and nuts g from the end of the cone. A similar ring, J, also sleeved upon the supports F, is adjustably supported from the ring I above it by means of the bolts h and nuts 1'.

In practice the sparks, in their upward progress in the stack and in their passage through the throat G, are conducted against the lower corrugated side of the cone H with sufficient force that, as they pass along the corrugated sides of such cone, they are broken into very small pieces, and the cone acts as a deflector,

so that the larger pieces are thrown down thereby, while the smaller and finer pieces will pass out of the influences of the draft in the cap of the stack. These that are thrown down are brought within the draft force, and are then thrown violently, under the aid of the draft, against thecorrugated under sides of the ring-deflectors I and J, until these pieces of incandescent fuel are so broken up ,that on finally escaping through the top ofthe cap they losetlieir incandcscence and fall to the ground. By this construction a screen-such as is usually employed at the top of the cap or near there-may be entirely omitted, if desired, and a fine screen will be found very detrimental, for it would have a tendency to check the free emission of such broken particles, while the absence of such fine screen would allow them to be thrown out under the force of the draft to such a height that they would not fall to the ground, except at the rear or near the rear of the moving train; and it will be noticed that by the methods described ot'securing the parts in place no obstructions of any kind are found in the stack proper.

What I claim as nay-invention is-- 1. In combination with a smoke-stack, A, mouth B, supports F, and outwardly-corrugated cone H, the ring I, circular in cross-section, with its lower surface corrugated, sleeved upon such supports,and adj ustably supported from the inverted base of the cone, substantially as and for the purposes set forth.

2. In a smoke-stack, the combination, with the stack A, month B, supports F, cone H, and ringl, of the ring J, curved in cross-section, corrugated upon its lower face, and adjustably supported from the ring I, substantially as and for the purposes described.

3. A smoke-stack wherein the stack A, month B, throat G, supports F, corrugated cone H, and corrugated rings I and J are constructed, arranged, and operate substantially as and for the purposes specified.

JAMES RITCHIE.

Witnesses:

H. S. SPRAGUE, E. SoULLY. 

